Astronomy Picture of the Day

The Perseus Cluster of Galaxies

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The Perseus Cluster of Galaxies


Here is one of the
largest objects that anyone will
ever see on the sky.

Each of these fuzzy blobs is a galaxy, together making up the
Perseus Cluster, one of the closest
of galaxies

The cluster is seen through a foreground of faint stars in our own
Milky Way Galaxy.

Near the cluster center, roughly 250 million light-years
away, is the cluster's dominant galaxy NGC 1275,
just left of picture center.

A prodigious source of
x-rays and radio emission,
NGC 1275 accretes
matter as gas and galaxies fall into it.

The Perseus Cluster of Galaxies
is part of the
Pisces-Perseus supercluster
spanning over 15 degrees and containing over 1,000 galaxies.

At the distance of NGC 1275, this view covers about 1.5 million

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